0:04Skip to 0 minutes and 4 secondsHello, and welcome to week three. Already in this course, you've learned about the Raspberry Pi computer, connected up a physical output in the form of an LED, and controlled it using Python. Controlling the physical world is a really powerful thing. And this week, you're going to learn how to react to it. Through a series of activities, you will learn to connect a button to your Raspberry Pi and write code to respond to it being pressed. You'll also learn about some of the many sensors that you could connect up in place of the humble button. And lastly, you'll learn how to get your students to make their own buttons using craft materials.